Imaging apparatus and method

摘要

Imaging apparatus comprises a record medium support (5) on which a record medium (6) is mounted in use. A radiation beam generator (1) generates a radiation beam modulated with imaging data which is directed towards the support. A system is provided for causing relative scanning movement between the beam and the support. A detection system (10) detects radiation emitted from the support (5) or the record medium (6) in response to incident radiation from the radiation beam generator (1) and having a wavelength different from the incident radiation so as to monitor for a change in intensity of the detected radiation indicative of the passage of the record medium edge.